Ion-chromatographic separation and determination of selenium, arsenic, molybdenum, tungsten and chromium as their oxoanions

1983 ◽  
Vol 316 (1) ◽  
pp. 8-12 ◽  
Author(s):  
Yu. A. Zolotov ◽  
O. A. Shpigun ◽  
L. A. Bubchikova
Keyword(s):  
Chromatographic Separation

DETERMINATION OF MICRO-AMOUNTS OF 5β-PREGNAN-3α-OL-20-ONE IN URINE USING INFRARED-SPECTROMETRY

1962 ◽  
Vol 41 (2) ◽  
pp. 234-246 ◽  
Author(s):  
H. J. van der Molen
Keyword(s):  
Infrared Spectrum ◽  
Quantitative Determination ◽  
Acid Hydrolysis ◽  
Chromatographic Separation ◽  
Pure Form ◽  
Infrared Spectrometry ◽  
Hydrolysis Of

ABSTRACT A procedure for the quantitative determination of 5β-pregnan-3α-ol-20-one in urine is described. After acid hydrolysis of the pregnanolone-conjugates in urine, the free steroids are extracted with toluene. Pregnanolone is isolated in a pure form as its acetate; after chromatographic separation of the free steroids on alumina, the fraction containing pregnanolone is acetylated and rechromatographed on alumina. Quantitative determination of the isolated pregnanolone-acetate is carried out with the aid of the infrared spectrum recorded by a micro KBr-wafermethod. The reliability of the method under various conditions is discussed under the headings, specificity, accuracy, precision and sensitivity. It is possible to determine 30–40 μg pregnanolone in a 24-hours urine portion with a precision of 25%.

Determination of Sulfite in Beer Based on Fluorescent Derivatives and Liquid Chromatographic Separation

2012 ◽  
Vol 70 (4) ◽  
pp. 296-302 ◽  
Author(s):  
Victor Abrahamsson ◽  
Signe Hoff ◽  
Nikoline J. Nielsen ◽  
Marianne N. Lund ◽  
Mogens L. Andersen
Keyword(s):  
Chromatographic Separation ◽  
Liquid Chromatographic Separation ◽  
Liquid Chromatographic ◽  
Fluorescent Derivatives

scholarly journals Micellar Electrokinetic Chromatographic Separation/Determination of Uranium, Iron, Copper and Nickel from Environmental Ore Samples Using Bis(salicylaldehyde)meso-stilbenediimine as Chelating Reagent

2013 ◽  
Vol 25 (7) ◽  
pp. 3719-3724 ◽  
Author(s):  
Muhammad Aslam Mirza ◽  
Muhammad Yar Khuhawar ◽  
Rafee Arain ◽  
Muhammad Aziz Choudhary ◽  
Abdul Jabbar Kandhro ◽  
...  
Keyword(s):  
Chromatographic Separation ◽  
Iron Copper ◽  
Chelating Reagent
Sign in / Sign up

Export Citation Format

Share Document